Ventilator.



' G; B. DETERMANN.

VENTILATOR. APPLICATION men APRIL 1915.

1,18358O4. i I Patented May16, 1916.

2 SHEETS-SHEET I.

G. B. DETERMANN.

VENTILATOR.

APPLICATION FILED AP11.2. 1915.

1,183,804. Patented May16, 1916.

2 SHEETS-SHEET 2.

1 [WE N TOR ATTORNEY UNITED srarns PATENT OFFICEF GEORGE B. DETERMANN, or LOUISVILLE, KENTUCKY, ASSIGNOR F ONE-HALF To 3'. F. WAGNERS SONS 00., OF LOUISVILLE, KENTUCKY, FIRM.

VENTILAT'O'R.

Specification of Letters Patent.

Patented May 16, 1916.

Application filedApril 2, 1915. Serial No. 18,666.

' To all whom it may concern Be it known that I, GEORGE B. DETER- MANN, a citizen of the United States, residing in the city of Louisville, county of Jefferson, and State of Kentucky, have invented a new and useful Improvement in Ventilators, of which the following is a specification.

This invention relates to ventilators of the class comprising a vertical shaft and has for an object the provision of a damper which will not only control the flow of air from the interior, but which will effectively prevent the entrance of rain orsnow which may be blown against the outside thereof.

Another object is the provision of a ventilator having an annular damper disposedon the exterior of the shaft with operating means therefor positioned within the shaft.

A further object is the provision of positive means for opening as well as closing the damper.

A still further object is the provision of simple effective means for maintaining the damper in a closed position.

lVith the foregoing and other objects in view the invention consists of the novel construction and arrangement of parts illustrated in the accompanying drawings which form a part of this specification, wherein is set forth an embodiment of the invention, but it is to beunderstood that such changes and modifications may be resorted to as come within the scope of the appended claim.

Referring tothe drawing wherein similar reference characters designate like parts in the several views: Figure 1, is a perspective view, with parts broken away, showing the damper in open position. Fig. 2, a vertical section, showing. the damper closed. Fig. 3, a plan of a ventilator having a glass top for the admission of light. Fig. 4, a section on line 33 of Fig. 3, showing the damper open. Fig. 5, a detached detail, on an enlarged scale, of the means for securing the glass top on the ventilator shaft. Fig. 6, a detached detail, on an enlarged scale, of the operating levers as holding the damper elevated (in closed position).

The ventilator is adapted to be placed above an opening in the roof of a building, or otherwise, in the usual manner and comprises a main shaft l0- preferably cylindrical, formed of any suitable material, a

hood, or top, 12, preferably cone shaped, is supported abovethe shaft a suitable distance by means of vertical arms 13 which are secured respectively tothe inner sideof the shaft and the under surface of the top.

The top which is of greater diameter thanthe shaft prevents rain, snow or down drafts I of air from entering same. A weather band 1e positioned about the ventilator, to prevent the entrance therei-nto of side currents of air, extends from a point above the edge'of the hood to a point below the upper end 'of the shaft, and is supported by braces 15 which extend from the hood. A

sleeve, or damper 16 is disposed about the upper end of the shaft and isadapted to slide thereon and be extended beyondthe end thereof to contact with the hood and close the space therebetween. A transverse bar 17 which'extends across the upper end of the sliding damper and is secured at each end thereto, rests uporrthe upper end of the shaft and acts as a support for the damper. A transverse bar .18 which is secured within the shaft,a suitable distance below the top thereof and parallel with the bar 17 serves as a support for a lever 19 which is pivotally connected intermediate its ends therewith by means of a bolt 20-. This lever has on one end an angular return 21 which extends therefrom at an acute angle toward the pivotal point 20. A connecting rod 22 is pivotally connected by means of bolts -23- and 24- respectively to the free end of said return and to the bar 17. Chains 25, and 26, or their equivalents, secured to the ends of the levers 19, depend therefrom and are provided, on

their lower ends, with tabs 27 and 28 indicating which to pull to obtain a desired result. A 'pull on the tab 27 labeled Shut will elevate the lever 19, on which is the extension 21, and through the medium of the connecting rod 22, the sliding damper 6, moving it into the closed position. As the damper reached the upper limit of its movement the pivotal point 23 passes beyond a line falling through the pivotal points 20 and 24 and the damper would descend by gravity, pushing the lever 19 on around, but that a shoulder, or abutment 30, on the arm 22, contacts with the extension 21, and further relative movement of the lever 19 mains elevated until traction is exerted on therefrom. In some cases it may be desired to provide a ventilator with a glass top, for the purpose of admitting light in such cases the center portion of the hood 12 is cut away leaving a frustrum shaped rim 32 which is supported by the arms 13. An annular band -33 having an outwa-rdlyextended horizontal flange c-34.' is supported, or held in position, by vertical extensions 35 from the braces 15.

p p A glass top 6- rests on the flange 34 and is encircled by. a flanged rim 37 which in turn is held in place by means of clips -38 secured on horizontal returns -39 from the vertical member 35 by means of bolts -&O.

It will be seen that by this construction :1

strong and inexpensive ventilator is provided. The damper being located outside the main shaft will positively prevent water or snow, which may be blown against the damper when closed, getting inside the main shaft. per is very rapid, andpositive; only a short pull on one chain or the other being required to open or close the damper, and also secure same in such a position; thus permitting The method of operating this dame chains to depend within reaching distance, or to be extended to a convenient point. By the use of two chains, one to open and one to close, the operations are equally rapid and positive. The possibility of not being able to operate the damper one way or the other, due to such common causes as thick paint, cinders, vdirt between the damper and shaft, etc., is reduced to a minimum, as dependence is not placed upon the damper dropping by gravity.

Having thus described my invention so that anyone skilled in the art pertaining thereto, may make and use the same, I claim:

A fixed support, a lever of the first order pivoted thereon, manipulative means depending from each end of said lever, an angular return on one end of said return and to an object to be raised, the point of attachment of said object and the pivot of said lever being in a vertical line, an abutment on said arm adapted to contact with the return after the pivotal point, between the arm and the return, has passed said vertical line, whereby the further movement of the arm and lever is stayed and the object sustained in the raised position.

GEORGE B. DETERMANN.

Witness WV. B. HUMMELL.

Copies oi this patent may be obtained. for five cents each, by addressing the Commissioner 01' Patents Washington, D. 0. 

